When Woolworths pretty much started trying to force me to use the SS checkout
I walked out leaving the basket of items on the counter and walked out forever.
I made sure, politely, that they knew why.
Recently Coles has been doing the same so I reacted the same way ensuring the
poor sheep using the machines knew my opinion.
I don't like the surveillance etc and the consequences of an honest mistake.
You can be sure that you will be held up for public ridicule at the very least.